Normal Distributions Area

What percent is represented by the area that is greater than 1?

• 68%

• 34%

• 16%

• 84%

What percent is represented by the area that is greater than 2?

• 2.5%

• 47.5%

• 95%

• 97.5%

What percent is represented by the area between -2 and -1?

• 12%

• 13.5%

• 15.75%

• 34%

What percent is represented by the area between -3 and -1?

• 13.25%

• 14.75%

• 15.35%

• 15.85%

What percent is represented by the area between 0 and 1?

• 68%

• 34%

• 95%

• 47.5%

• 15%

• 0.15%

• 3%

• 0.3%

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 12 and 15 days?

• 68%

• 34%

• 16%

• 2.5%

The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds.  What is the z-score for a player who runs a time of 5.6 seconds?

• -1.33

• 1.33

• 0.88

• 1.02

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5.  What proportion of weeks would you expect to have less than 5 accidents?

• 0.6915

• 0.1762

• 0.8238

• -0.93

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5.  What proportion of weeks would you expect to have more than 7 accidents?

• 0.3446

• 0.2856

• 0.4

• 0.6554